Horton

Re: Direct I/O

Mikael Kjellström <mikael.kjellstrom@mksoft.nu>

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From: Mikael Kjellström <mikael.kjellstrom@mksoft.nu>
To: Tom Lane <tgl@sss.pgh.pa.us>, Thomas Munro <thomas.munro@gmail.com>
Cc: Mikael Kjellström <mikael.kjellstrom@gmail.com>, Andres Freund <andres@anarazel.de>, Andrew Dunstan <andrew@dunslane.net>, Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>, Christoph Berg <myon@debian.org>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2023-04-15T05:48:52Z
Lists: pgsql-hackers 

On 2023-04-15 05:22, Tom Lane wrote:
> Thomas Munro <thomas.munro@gmail.com> writes:
>> On Sat, Apr 15, 2023 at 7:50 AM Mikael Kjellström
>> <mikael.kjellstrom@gmail.com> wrote:
>>> want me to switch to clang instead?
> 
>> I vote +1, that's the system compiler in modern OpenBSD.
> 
> Ditto, we need coverage of that.

OK. I switched to clang on morepork now.


>> As for curculio, I don't understand the motivation for maintaining
>> that machine.  I'd rather know if OpenBSD 7.3 works.
> 
> Those aren't necessarily mutually exclusive :-).  But I do agree
> that recent OpenBSD is more important to cover than ancient OpenBSD.

So do you want me to switch that machine to OpenBSD 7.3 instead?

/Mikael

Commits

  1. Rename hook functions for debug_io_direct to match variable name.

  2. Rename io_direct to debug_io_direct.

  3. Skip the 004_io_direct.pl test if a pre-flight check fails.

  4. Use higher wal_level for 004_io_direct.pl.

  5. Skip \password TAP test on old IPC::Run versions

  6. Add io_direct setting (developer-only).

  7. Introduce PG_IO_ALIGN_SIZE and align all I/O buffers.

  8. Add palloc_aligned() to allow aligned memory allocations

  9. initdb: When running CREATE DATABASE, use STRATEGY = WAL_COPY.